辐射接枝法制备氧肟化超高分子量聚乙烯及其重金属吸附性能  

Preparation of hydroxoxime group-modified ultra-high molecular weight polyethylene fiber adsorbent by radiation-induced graft polymerization and its application to heavy metal ions removal

作　　者：郝杏芳 咸春颖[1] 王衡东[2] 沈丽[1] HAO Xingfang;XIAN Chunying;WANG Hengdong;SHEN Li(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201821,China)

机构地区：[1]东华大学化学与化工学院,上海201620 [2]中国科学院上海应用物理研究所,上海201821

出　　处：《辐射研究与辐射工艺学报》2023年第2期23-31,共9页Journal of Radiation Research and Radiation Processing

摘　　要：采用60Co-γ预辐射接枝法将丙烯酸和丙烯酰胺先后接枝于超高分子量聚乙烯纤维上,随后用羟胺碱溶液对纤维进行氧肟化改性,制备出含氧肟酸基、酰胺基和羧基的超高分子量聚乙烯纤维吸附剂。扫描电子显微镜(SEM)图、傅里叶变换衰减全反射红外光谱(ATR-FTIR)谱图和热重曲线均表明,丙烯酰胺和丙烯酸成功接枝到纤维上,且氧肟化反应成功将酰胺基转化为氧肟基。重金属离子吸附性能测试结果表明:所制备的超高分子量纤维吸附剂对Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ) 3种重金属离子吸附容量最高可达到318 mg/g、165 mg/g、140 mg/g(吸附质量浓度为500 mg/L,时间为4 h);在竞争吸附实验中,对Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)离子的去除率分别为99.5%、43.5%、60.5%(Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)离子初始质量浓度均为200 mg/L,吸附剂用量为3 g/L)。The secondary grafting of acrylic acid and acrylamide onto ultra-high-molecular-weight polyethylene(UHMWPE)fibers was accomplished through 60Co gamma-ray pre-irradiation,and UHMWPE fiber adsorbents containing hydroxamic,amide,and carboxyl groups were prepared through a hydroxamic reaction.The results of scanning electron microscope(SEM),attenuated total internal reflectance Fourier transform infrared spectroscopy(ATR-FTIR),and thermogravimetric analysis(TGA)all showed that acrylamide and acrylic acid were successfully grafted onto the fiber and that the hydroxamic reaction successfully converted the amide group into the hydroxamic group.Evaluation of the heavy metal ion adsorption performance indicated that the adsorption capacities of the UHMWPE fiber adsorbent for Cu(II),Co(II),and Ni(II)could reach 318 mg/g,165 mg/g,and 140 mg/g,respectively(the adsorption concentration was 500 mg/L for 4 h).In the competitive adsorption of coppercobalt-nickel mixed heavy metal ions,the removal rates of the copper,cobalt,and nickel ions were 99.5%,43.5%,and 60.5%, respectively (the initial ion concentrations were all 200 mg/L and the amount of adsorbent used was3 g/L).

关 键 词：超高分子量聚乙烯纤维 预辐照 丙烯酰胺 氧肟酸 重金属离子吸附 

分 类 号：TL13[核科学技术—核能科学]